leisttz



(No Model.) I 2 Sheets-Sheet 1 S. A. LENTZ.

MACHINE FOB. CUTTING SHANKS,- 5m... FROM LEATHER. No. 807,780. Patented Nov. 11, 1884.

(No Model.) 2 SheetsSheet 2.

- S. A. LENTZ.

MACHINE FOR CUTTING SHANKS, 850., FROM LEATHER.

Patentd N0v. 11, 1884.

i. WW". L. 4. miWNW lUNrTnn STATES PATENT @rrrcn.

SILAS A. LENTZ, OF ALLENTOWN, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO JOHN E. LENTZ, OF SAME PLACE.

MACHINE FOR CUTTING SHANKS, 84.0., FROM LEATHER.

EiPECIFIOATION forming part of Letters Patent No. 307,780, dated November 11, 188%.

Application filed August 4, 1884. (No model.)

To all whom it. may concern:

Be it known that I, SILAS A. LENTZ, a citizen of the United States, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful Improvements in Machines for Cutting Shanks and other Articles from Leather, &c.,

of which the following is a specification, reference being had therein to the accompanying IO drawings.

This invention has relation to means for cutting-shanks, heel-stiffeners, toe-boxes, and other irregular shapes and fillings from leather; and it consists in the combination of certain mechanical devices, constructed and arranged as hereinafter described, and specifically set forth in the claims.

The invention in this instance has reference more particularly to the mechanism herein shown and described, which is constructed, arranged, and adapted to practice a novel method of producing articles of a certain class or classes,which method is notherein claimed, as it forms the subject-matter of a companion application, Serial N 0. 139,597, filed and pending herewith, and indicated as Case A. As set forth in said pending application, the nov elty of the method comprises the act of applying variable pressure at both sides of the material operated upon at the time that a cut is made therein, so as to determine not only the outline, but the superficial contour of all surfaces of the articles to be produced by the 'machine.

Referring to the drawings, Figure 1 is a plan, and Fig. 2 an end elevation, of a ma chine constructed in accordance with my invention and adapted to practice the abovementioned method. Figs. 3 and 4 are elevations of patternrollers having, respectively, a depressed and a projecting pattern upon their peripheries. Fig. 5 is a central section of the same rollers placed in contact with each other. Fig. 6 is a plan of a scrap of leather as it appears after a shank has been cut therefrom by the machine. Fig. 7 is a plan of the shank produced. Fig. 8 is a section on the line X of Fig. 6, and Fig. 9 is a plan of a heel-stiffener produced by the rolls shown in Figs. 3 and 4. I

Like letters indicate like parts in all the figures.

Upon a suitable base, A, is a standard, B, having bearings for a shaft, 0, and for the other operating devices of the machine. The shaft 0 carries the roller D, which is secured upon the shaft by means of a spline, (not shown,)which enters the seat D, (see Fig. 5,) formed in the roll, and by a nut, O, threaded on the end of the shaft. Upon the opposite end of the shaft is a master-gear, E, which meshes with apinion, F, mounted upon acounter-shaft, F, and provided with a driving-pulley, F

In the upper portion of the standard B, and 6 upon a bolt, G, is pivoted the lever H, having a bearing, H, (see Fig. 1,) for a shaft, I, provided with a roll, I, secured to the shaft by a nut, O. The arm or lever H is extended in rear of its pivot and abuts against a spring, 0 H, which in turn rests againstthebase or standard, whereby, through the pivotal action of the arm H, the roll Iis held yieldingly against the roll D.

In front of the pivot G is an adj Listing-screw, J, having a jam-nut, J, and arranged to bear against the standard, so that by regulating the screw the rolls D I may be prevented from coming into actual contact with each other, and may be adjusted to or from each other to adapt them to operate upon material of varied thicknesses. The shaft I is provided with a pinion, 1 which mesheswith a similar pinion mounted on the shaft 0, (said pinion not being shown,) so that when power is applied at the driving-pulley motion is conveyed by means of the pinion F and master-gear E and the gears 1 and its companion on the shaft 0 to the rolls, so as to rotate them in the direction indicated by the arrows. The knife Kis 0 held between the rolls, almost, if not actually, in contact with the-lower one of the two, and as near their line of contact as practicable, by means of a knife-supporting longitudinallyslotted bar, K, which is mounted upon a 5 ledge, B, (formed on the standard 13,) by means of a threaded bolt, K seated at its inner end in the standard B. In order to give the proper inclination to the knife, the ledge B may be inclined or it may be horizontal, r00

and screws or bolts K, passing vertically through the bar K-one at each side of'the bolt -may be used,when by turning said screws the front edge of the knife may be elevated or depressed, as desired.

In Figs. 1 and 2 the rolls D and I are adapted by their configuration to make shanks like that illustrated in Fig. 7. The similar rolls D and I represented in Figs. 3, 4, and are adapted to make heel-stiffeners such as that illustrated in Fig. 9, and other similar rolls may in a manner (hereinafter described) be adapted to make toeboxes and allirregular shapes of leather, paper, veneer, or other materials, so that a description of the means or configuration given to the rolls D I herein shown will be sufficient to enable persons skilled in the art to construct rolls for other special purposes.

To form shanks the roll I is provided in this instance with two peripheral cams, 1 which project from the periphery of the roll, and which are in shape and outline substantially like the shank Y, Fig. 7, the differences in shape and outline being proportionate, and for the purpose of determining the shape of the shank to be produced by the machine. The rollD is provided with substantially similarly-shaped recesses D", so that in the rotation of the two rolls the cams I mesh with the recess D Clearances I and D are provided at each end of the cams and recesses for the purpose of commencing the cut at the surface of the material and to facilitate feeding it to the machine.

Referring to Figs. 3, 4t, 5, and 9, the projecting cam I and recess D are formed so as toproduce a heel-stiffener, Z, Fig. 9, and have the following relative proportions, uniform outlines, and uniform tapers, as D* I*, near the outlines, and dissimilar curvatures, as D I The edge of the knife K being straight, it will be noticed that the farther from the periphery of the roll I that the cam I projects the more material will be depressed into the recess D of the roll D, so that, the line of cutting being, for example, at the line X, Fig. 8, the strip removed from the material will be thicker, and where the article is to be thinner the cam is thinned thinner, or projects to a less distance from the periphery of the roll I. Therefore, by determining the outline and shape of the cams the skiving of an articlesuch as the heel-stiffener-may be made over a broad surface, as at Z, and over a narrower portion, as at Z, and over a still narrower portion, Z, and otherwise disposed in accordance with the requirements of any irregular piece or filling. This is an advantage over old methods and means, in that by such methods and means the skiving of aheel-stiffener to a greater depth on the line Z than is actually necessary for lasting or securing the skived edge at the heel often occurs, thus leaving a portion of the skiving just outside of the joint or place of connection, so that the stiffener itself is weakened thereby, and so,

too, with the portions Z, which are taken into the seams on the side, skiving is required and desired only for such portions as enter the seams and joints. By the use of my inventlion absolute uniformity is secured in the prouct.

In view of the companion application referred to, I deem it unnecessary to particularly describe the method of operation practiced by this machine, except to state that it will be readily seen that the variations in the amount of material depressed below the cutting-line not only determines the thickness of the article at different points, but also determines its outline, and while the knife determines the shape of one surface of the article produced the shape of the opposite surfaces is in part determined by the shape of the recess D in the roll D. For example, referring to Figs. 6 and 7, the shank while being thicker is also narrower at the line X, Fig. 7, by reason of the greater projection of the cam I and the increased amount of material depressed below the knife at that portion of the shank. v 7

As before stated, the method herein disclosed is not herein claimed, for the reason given, and I deem it proper to add that I do not confine my invention in this instance to the exact details of mechanical construction shown; but I may alter the same in any manner and to any extent within the skill of persons conversant in the building of similar machinery, and I may vary the pattern of the rolls so as to produce desired articles without a departure from the spirit of my invention.

Having described my invention and its operation, what I claim is- 1. In a machine for making shanks and analogous articles, the combination of a cuttinginstrument and two rolls, the one having a complete cam or pattern projecting from its periphery, and the other having a complete pattern depressed below its periphery, said patterns being arranged to register with each other, and the said cutting-instrument being arranged between the rolls, substantially as specified.

2. In a machine for-making shanks and analogous articles, the combination of the roll I, having the cams I projecting from its periphery and shaped similar to a shank,with'a roll, D, having similarly-shaped complete patterns, recesses, or depressions registering with said cams and with the knife K, substantially as specified.

3. The combination of the standard B, having a bearing for a shaft, G, carrying the pattern-roll D, and for the bar K, carrying the knife K,with the shaft I, carrying the patternroll I, mounted in a pivoted arm or lever having a bearing in the standard, and a spring, as H arranged between the arm or lever and the standard, substantially as specified.

4.. The combination, with the pattern-rolls substantially conforming with each other, as at D I, and non-conforming, as at D I with a roll, and having the clearances D I substan- 1c tially as shown and described. I

In testimony whereof I affiX my signature in presence of two witnesses.

SILAS A. 'LENTZ.

cutting-instrument, as K, arranged between the rolls, substantially as shown and described.

5. The combination,with the rolls D and I of the shaft I and arm or lever H, having 5 screw J and spring H substantially as shown and described.

6. The combination of the knife K with the l WVitnesses: rolls D and I, having the patterns D 1 the Trros. O. GINKINGER, latter projecting from the periphery of the EDWARD H. RENINGER. 

